Electric alarm.



H. D. HANSON.

ELECTRIC ALARM.

APPLICATION FILED 111 3.24, 1909.

Patented Aug. 26,

Harry i215 Witnesses 0 JELLRRY I). HANSON, 01* EAST BOSTQN,MASSACHUSETTS.

ntnc'rieio ALARM.

Specification of Letters Eatent.

Patented Aug. 16, 1916.

Application filed April 24., 1909. Serial No. 91,990.

To all whom it may concern:

Be it known that I Haney D. Hanson, a

. citizen of the United States, residing at East Boston, in the countyof Suiiolk and State of lllassachusctts, have invented new and usefulImprovements in Electric Alarms, of which the following in aspecification.

The purpose of the present invention is to combine with a clock or otherform of time movement an electric circuit including a switch, a lamp anda bell and circuit closing means of novel construction and arrangementwhereby at a predetermined timethe aforesaid electric circuit is closedand the bell sounded and the lamp lighted.

he invention is particularly adapted for time movements provided withthe usual spring alarm mechanism which is adapted to be set oil at agiven time, the expansive action of the alarm spring being utilized asmeans for automatically completing the circuit through the circuitclosing means.

The primary object of the invention is to supplement the action of theusual spring actuated alarm mechanism and to illuminate the dial of theclock so that the relative po' sition of the hands may be ascertained ata glance, the electric alarm continuinguntil the circuit is interruptedby throwing the switch.

With the above and other objects in view the invention consists in theconstruction, combination and arrangement of parts as will behereinafter more fully described in detail and pointed out in theappended claim. 7

Referring to the drawings forming a part of the specifications: Figure lis a rear view of an alarm clock provided with an electric circuit andcircuit closing means embodying the invention. Fig. 2 is a View of theparts shown in Fig. l, the movable element of the circuit closeroccupying the position which it will assume when the electric circuit isclosed. Fig. 3 is a perspective view of the movable member of thecircuit closer and the supporting means therefor.

Corresponding and like parts are rcierrec to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The time movement illustrated may be of any type provided with a springactuated alarm which is adapted to be set to sound the alarm at anygiven time. The spring for ope ating the alarm is indicated at 1.

The electric circuit cooperating with the time movement includes h bell2, a lamp 3, and switch l. The battery for supplying the clectro-inotiveforce is indicated at 5. One end of the wire forming the circuitconnects with the 'case 6 of the clock or time movement at 7. The otherend of the wire is in electrical connection with a circuit closmg member8 which supported by the case or movement but electrically insulatedtherefrom. The. member 8 consists of a spring arm which is attached to asupport 9 of dielectric material. The manner of supporting the member 8is immaterial within the purview of the invention so long as ti e sameis electrically insulated from the movei'ncnt and is positioned to beactuated by the alarm spring; 1 so as to close the circuit when theusual alarm mechanism of clock or time movement is sounded. the clockcase which is usually of metal is included in the circuit, the movementand the spring 1 are also included in the circuit, hence, it becomesnecessary to electrically insulate the circuit closing member 8 from thespring 1 iii order to prevent short circuiting of the operating ci'cuit. Insulating material 10 is applied to the circuit closing member 8and is in the nature of a sleeve slipped thereon so as to preventpossible displacement. When the spring 1 is wound as indicated in F 1g.1 the circuit closing memher 8 automatica lears the clock case. hence,the operating or working circuit is broken. However when the sfa insounds and the spring l is practically run down, the circuit closingmember 8 is moved outward at its tree end by the expansive action of thespring 1 and brought into clcc trical connection with the clocl: case at11 hereby closing the operating circuit and SOllDtllllg' the hell 2 andcausing; tlielamp 3 to light. is assumed that the switch 2 is closed asindicated in Fig. :2. The lamp 3 is so positioned as to shed its lig 'ht upon the face or dial of the clock so as to nnuninate the samoandenable the occupant of the room in which the appliance is located toobser e the time even though the room may be darkened. The bell 2 will.continue to sound and the lamp 3 to burn so long as the circuit isclosed and provided the battery or Sinceelectro-motive force is notexhausted. When the switch 4 is opened as indicated in Fig. 1 theoperating circuit is broken, hence, the lamp is extinguished and thebell quieted.

The invention may be adapted to any type or style of clock movement andthe circuit may be closed at 11 in any manner so long as the expansiveaction of the alarm spring 1 is utilized as the actuating means formoving the member 8 to close the operating circuit. i

From the foregoing descriptiom taken in connection with the accompanyingdrawing, the advantages of the construction and of the method ofoperation will be readily apparent to those skilled in the art to whichthe invention appertains, and while I have described the principle ofoperation of the invention, together with the device which I nowconsider to be the best embodiment thereof, I desire to have itunderstood that the device shown is'merely illustrative and that suchchanges may be made when desired as are within the scope of the claimappended hereto.

Having thus described the invention, What is claimed is i Incombination, a clock embodying a metal case and an alarm mechanismactuated by means of a coil' spring, an electric circuit. including aswitch, a lamp and a bell, and having the clock case and said coilspring included therein as a part, a spring arm also included in theelectric circuit and forming a terminal thereof and in contact with saidcoil spring and adaptedto be actuated thereby, a dielectric support forthe spring arm secured to the clock case, and a sleeve of insulatingmaterial slipped upon said spring arm.

In testimony whereof I affix my signature in presence of two witnesses.

HARRY D. HANSON. Witnesses JOHN J. Corner, DANIEL J. (hmAMnu.

